21331130213 has 4 divisors (see below), whose sum is σ = 21472396128. Its totient is φ = 21189864300.

The previous prime is 21331130207. The next prime is 21331130257. The reversal of 21331130213 is 31203113312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21331130213 - 2⁸ = 21331129957 is a prime.

It is a super-2 number, since 2×21331130213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331130113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70632731 + ... + 70633032.

It is an arithmetic number, because the mean of its divisors is an integer number (5368099032).

Almost surely, 2^21331130213 is an apocalyptic number.

It is an amenable number.

21331130213 is a deficient number, since it is larger than the sum of its proper divisors (141265915).

21331130213 is a wasteful number, since it uses less digits than its factorization.

21331130213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141265914.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21331130213 its reverse (31203113312), we get a palindrome (52534243525).

The spelling of 21331130213 in words is "twenty-one billion, three hundred thirty-one million, one hundred thirty thousand, two hundred thirteen".